Add new action: Assign automatically a category based on a link

app/Action/TaskAssignCategoryLink.php

@@ -0,0 +1,84 @@
+<?php
+
+namespace Kanboard\Action;
+
+use Kanboard\Model\TaskLink;
+
+/**
+ * Set a category automatically according to a task link
+ *
+ * @package action
+ * @author  Olivier Maridat
+ */
+class TaskAssignCategoryLink extends Base
+{
+    /**
+     * Get the list of compatible events
+     *
+     * @access public
+     * @return array
+     */
+    public function getCompatibleEvents()
+    {
+        return array(
+            TaskLink::EVENT_CREATE_UPDATE,
+        );
+    }
+
+    /**
+     * Get the required parameter for the action (defined by the user)
+     *
+     * @access public
+     * @return array
+     */
+    public function getActionRequiredParameters()
+    {
+        return array(
+            'category_id' => t('Category'),
+            'link_id' => t('Link id'),
+        );
+    }
+
+    /**
+     * Get the required parameter for the event
+     *
+     * @access public
+     * @return string[]
+     */
+    public function getEventRequiredParameters()
+    {
+        return array(
+            'task_id',
+            'link_id',
+        );
+    }
+
+    /**
+     * Execute the action (change the category)
+     *
+     * @access public
+     * @param  array   $data   Event data dictionary
+     * @return bool            True if the action was executed or false when not executed
+     */
+    public function doAction(array $data)
+    {
+        $values = array(
+            'id' => $data['task_id'],
+            'category_id' => isset($data['category_id']) ? $data['category_id'] : $this->getParam('category_id'),
+        );
+
+        return $this->taskModification->update($values);
+    }
+
+    /**
+     * Check if the event data meet the action condition
+     *
+     * @access public
+     * @param  array   $data   Event data dictionary
+     * @return bool
+     */
+    public function hasRequiredCondition(array $data)
+    {
+        return $data['link_id'] == $this->getParam('link_id');
+    }
+}